Star Industries owns and operates landfills for several municipalities throughout the Midwestern part of the U$.$S$.$ Star typically contracts with the municipality to provide landfill services for a period of $20$ years. The firm then constructs a lined landfill$($required by federal$$ law$)$ that has capacity for five years. The $$$$9$ million expenditure required to construct the new landfill results in negative cash flows at the end of years$5,10,$ and $15.$ This change in sign on the stream of cash flows over the$20-$year contract period introduces the potential for multiple$$ IRRs, so$$ Star's management has decided to use the MIRR to evaluate new landfill investment contracts. The annual cash inflows to Star begin in year $1$ and extend through year $20$ are estimated to equal $$$$3\mathrm{.}3$ million$($this does not reflect the cost of constructing the landfills every five$$ years$).$ Star uses a $9\mathrm{.}8\%$ discount rate to evaluate its new$$ projects, so it plans to discount all the construction costs every five years back to year $0$ using this rate before calculating the MIRR.

a$.$What are the$$ project's NPV$,$ IRR, and$$ MIRR?

b$.$Is this a good investment opportunity for Star$$ Industries? Why or why$$ not?